#pragma once
#include "muduo/proto/codec.h"
#include "muduo/proto/dispatcher.h"

#include "muduo/base/Logging.h"
#include "muduo/base/Mutex.h"
#include "muduo/net/EventLoop.h"
#include "muduo/net/TcpServer.h"

#include "mq_connection.hpp"
#include "mq_consumer.hpp"
#include "mq_host.hpp"
#include "../mqcomm/mq_threadpool.hpp"
#include "../mqcomm/mq_msg.pb.h"
#include "../mqcomm/mq_proto.pb.h"

namespace ns_kkymq
{
    #define DBFILE "/meta.db"
    #define HOSTNAME "MyVirtualHost"
    class Server
    {
    public:
        typedef std::shared_ptr<google::protobuf::Message> MessagePtr;
        Server(int port, const std::string &basedir)
            : _server(&_baseloop, muduo::net::InetAddress("0.0.0.0", port), "Server",
                      muduo::net::TcpServer::kNoReusePort),
              _dispatcher(std::bind(&Server::onUnknownMessage, this, std::placeholders::_1,
                                    std::placeholders::_2, std::placeholders::_3)),
              _codec(std::make_shared<ProtobufCodec>(std::bind(&ProtobufDispatcher::onProtobufMessage, &_dispatcher,
                                                                std::placeholders::_1, std::placeholders::_2, std::placeholders::_3))),
              _virtual_host(std::make_shared<VirtualHost>(HOSTNAME,basedir, basedir + DBFILE)),
              _consumer_manager(std::make_shared<ConsumerManager>()),
              _connection_manager(std::make_shared<ConnectionManager>()),
              _threadpool(std::make_shared<threadpool>())
        {
            // 针对历史消息中的所有队列，要初始化队列的消费者管理结构
            QueueMap qm = _virtual_host->allQueues();
            for (auto &q : qm)
            {
                _consumer_manager->initQueueConsumer(q.first);
            }

            // 注册业务请求处理函数
            _dispatcher.registerMessageCallback<ns_kkymq::openChannelRequest>(
                std::bind(&Server::onOpenChannel, this,
                          std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));

            _dispatcher.registerMessageCallback<ns_kkymq::closeChannelRequest>(
                std::bind(&Server::onCloseChannel, this,
                          std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));

            _dispatcher.registerMessageCallback<ns_kkymq::declareExchangeRequest>(
                std::bind(&Server::onDeclareExchange, this,
                          std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));

            _dispatcher.registerMessageCallback<ns_kkymq::deleteExchangeRequest>(
                std::bind(&Server::onDeleteExchange, this,
                          std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));

            _dispatcher.registerMessageCallback<ns_kkymq::declareQueueRequest>(
                std::bind(&Server::onDeclareQueue, this,
                          std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));

            _dispatcher.registerMessageCallback<ns_kkymq::queueBindRequest>(
                std::bind(&Server::onQueueBind, this,
                          std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));

            _dispatcher.registerMessageCallback<ns_kkymq::queueUnBindRequest>(
                std::bind(&Server::onQueueUnBind, this,
                          std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));

            _dispatcher.registerMessageCallback<ns_kkymq::basicPublishRequest>(
                std::bind(&Server::onBasicPublish, this,
                          std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));

            _dispatcher.registerMessageCallback<ns_kkymq::basicAckRequest>(
                std::bind(&Server::onBasicAck, this,
                          std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));

            _dispatcher.registerMessageCallback<ns_kkymq::basicConsumeRequest>(
                std::bind(&Server::onBasicConsume, this,
                          std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));

            _dispatcher.registerMessageCallback<ns_kkymq::basicCancelRequest>(
                std::bind(&Server::onBasicCancel, this,
                          std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));

            _server.setMessageCallback(std::bind(&ProtobufCodec::onMessage, _codec.get(), std::placeholders::_1,
                                                 std::placeholders::_2, std::placeholders::_3));
            _server.setConnectionCallback(std::bind(&Server::onConnection, this, std::placeholders::_1));
        }

        void start()
        {
            _server.start();
            _baseloop.loop();
        }

    private:
        // 打开信道
        void onOpenChannel(const muduo::net::TcpConnectionPtr &conn, const openChannelRequestPtr &req, muduo::Timestamp)
        {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if (mconn.get() == nullptr)
            {
                lg(Debug, "打开信道时,没有找到连接对应的Connection对象!");
                conn->shutdown();
                return;
            }
            mconn->openChannel(req);
        }
        // 关闭信道
        void onCloseChannel(const muduo::net::TcpConnectionPtr &conn, const closeChannelRequestPtr &req, muduo::Timestamp)
        {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if (mconn.get() == nullptr)
            {
                lg(Debug, "关闭信道时,没有找到连接对应的Connection对象!");
                conn->shutdown();
                return;
            }
            mconn->closeChannel(req);
        }
        // 声明交换机
        void onDeclareExchange(const muduo::net::TcpConnectionPtr &conn, const declareExchangeRequestPtr &req, muduo::Timestamp)
        {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if (mconn.get() == nullptr)
            {
                lg(Debug, "声明交换机时,没有找到连接对应的Connection对象!");
                conn->shutdown();
                return;
            }
            // std::cout<<"cid : "<<req->cid()<<std::endl;
            Channel::ptr cp = mconn->getChannel(req->cid());
            if (cp.get() == nullptr)
            {
                lg(Debug, "声明交换机时,没有找到信道!");
                return;
            }
            return cp->declareExchange(req);
        }
        // 删除交换机
        void onDeleteExchange(const muduo::net::TcpConnectionPtr &conn, const deleteExchangeRequestPtr &req, muduo::Timestamp)
        {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if (mconn.get() == nullptr)
            {
                lg(Debug, "删除交换机时,没有找到连接对应的Connection对象!");
                conn->shutdown();
                return;
            }
            Channel::ptr cp = mconn->getChannel(req->cid());
            if (cp.get() == nullptr)
            {
                lg(Debug, "删除交换机时,没有找到信道!");
                return;
            }
            return cp->deleteExchange(req);
        }
        // 声明队列
        void onDeclareQueue(const muduo::net::TcpConnectionPtr &conn, const declareQueueRequestPtr &req, muduo::Timestamp)
        {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if (mconn.get() == nullptr)
            {
                lg(Debug, "声明队列时,没有找到连接对应的Connection对象!");
                conn->shutdown();
                return;
            }
            Channel::ptr cp = mconn->getChannel(req->cid());
            if (cp.get() == nullptr)
            {
                lg(Debug, "声明队列时,没有找到信道!");
                return;
            }
            return cp->declareQueue(req);
        }
        // 删除队列
        void onDeleteQueue(const muduo::net::TcpConnectionPtr &conn, const deleteQueueRequestPtr &req, muduo::Timestamp)
        {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if (mconn.get() == nullptr)
            {
                lg(Debug, "删除队列时,没有找到连接对应的Connection对象!");
                conn->shutdown();
                return;
            }
            Channel::ptr cp = mconn->getChannel(req->cid());
            if (cp.get() == nullptr)
            {
                lg(Debug, "删除队列时,没有找到信道!");
                return;
            }
            return cp->deleteQueue(req);
        }
        // 队列绑定
        void onQueueBind(const muduo::net::TcpConnectionPtr &conn, const queueBindRequestPtr &req, muduo::Timestamp)
        {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if (mconn.get() == nullptr)
            {
                lg(Debug, "队列绑定时,没有找到连接对应的Connection对象!");
                conn->shutdown();
                return;
            }
            Channel::ptr cp = mconn->getChannel(req->cid());
            if (cp.get() == nullptr)
            {
                lg(Debug, "队列绑定时,没有找到信道!");
                return;
            }
            return cp->queueBind(req);
        }
        // 队列解绑
        void onQueueUnBind(const muduo::net::TcpConnectionPtr &conn, const queueUnBindRequestPtr &req, muduo::Timestamp)
        {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if (mconn.get() == nullptr)
            {
                lg(Debug, "队列解绑时,没有找到连接对应的Connection对象!");
                conn->shutdown();
                return;
            }
            Channel::ptr cp = mconn->getChannel(req->cid());
            if (cp.get() == nullptr)
            {
                lg(Debug, "队列解绑时,没有找到信道!");
                return;
            }
            return cp->QueueUnBind(req);
        }
        // 消息发布
        void onBasicPublish(const muduo::net::TcpConnectionPtr &conn, const basicPublishRequestPtr &req, muduo::Timestamp)
        {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if (mconn.get() == nullptr)
            {
                lg(Debug, "消息发布时,没有找到连接对应的Connection对象!");
                conn->shutdown();
                return;
            }
            Channel::ptr cp = mconn->getChannel(req->cid());
            if (cp.get() == nullptr)
            {
                lg(Debug, "消息发布时,没有找到信道!");
                return;
            }
            return cp->basicPublish(req);
        }
        // 消息确认
        void onBasicAck(const muduo::net::TcpConnectionPtr &conn, const basicAckRequestPtr &req, muduo::Timestamp)
        {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if (mconn.get() == nullptr)
            {
                lg(Debug, "消息确认时,没有找到连接对应的Connection对象!");
                conn->shutdown();
                return;
            }
            Channel::ptr cp = mconn->getChannel(req->cid());
            if (cp.get() == nullptr)
            {
                lg(Debug, "消息确认时,没有找到信道!");
                return;
            }
            return cp->basicAck(req);
        }
        // 队列消息订阅
        void onBasicConsume(const muduo::net::TcpConnectionPtr &conn, const basicConsumeRequestPtr &req, muduo::Timestamp)
        {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if (mconn.get() == nullptr)
            {
                lg(Debug, "队列消息订阅时,没有找到连接对应的Connection对象!");
                conn->shutdown();
                return;
            }
            Channel::ptr cp = mconn->getChannel(req->cid());
            if (cp.get() == nullptr)
            {
                lg(Debug, "队列消息订阅时,没有找到信道!");
                return;
            }
            return cp->basicConsume(req);
        }
        // 队列消息取消订阅
        void onBasicCancel(const muduo::net::TcpConnectionPtr &conn, const basicCancelRequestPtr &req, muduo::Timestamp)
        {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if (mconn.get() == nullptr)
            {
                lg(Debug, "队列消息取消订阅时,没有找到连接对应的Connection对象!");
                conn->shutdown();
                return;
            }
            Channel::ptr cp = mconn->getChannel(req->cid());
            if (cp.get() == nullptr)
            {
                lg(Debug, "队列消息取消订阅时,没有找到信道!");
                return;
            }
            return cp->basicCancel(req);
        }
        void onUnknownMessage(const muduo::net::TcpConnectionPtr &conn, const MessagePtr &message, muduo::Timestamp)
        {
            LOG_INFO << "onUnknownMessage: " << message->GetTypeName();
            conn->shutdown();
        }

        void onConnection(const muduo::net::TcpConnectionPtr &conn)
        {
            // LOG_INFO << conn->peerAddress().toIpPort() << " -> "
            //          << conn->localAddress().toIpPort() << " is "
            //          << (conn->connected() ? "UP" : "DOWN");
            if (conn->connected())
            {
                _connection_manager->newConnection(_virtual_host, _consumer_manager,
                                                   _codec, conn, _threadpool);
            }
            else
            {
                _connection_manager->deleteConnection(conn);
            }
        }

    private:
        muduo::net::EventLoop _baseloop;
        muduo::net::TcpServer _server;  // 服务器对象
        ProtobufDispatcher _dispatcher; // 请求分发器对象 -- 要像其中注册请求处理函数
        ProtobufCodecPtr _codec;        // protubuf协议处理器 -- 针对收到的请求数据进行protobuf协议处理
        VirtualHost::ptr _virtual_host;
        ConsumerManager::ptr _consumer_manager;
        ConnectionManager::ptr _connection_manager;
        threadpool::ptr _threadpool;
    };
}